number_one_c55

Anyone have any idea's, checked codes no codes. When I first bought the car it had the spark plugs, distributor caps, rotors and cam seals replaced and the car hauled like a freight train. The other day, I decided to give it full throttle away from a stop and the car still pulled but was noticeably slower than my first experience. I noticed, if I keep the car in second or third gear and accelerate from 1500-6000RPM I can feel a HUGE power surge around 3000-3500 RPM anything above that RPM it reminds me of when I first bought it. The car also seems to produce lots of intake noise when hard acceleration below 3000RPM like the engine is chugging or not getting enough air, that being said ive had the air filters out and checked them and they are clean as can be......any one have any ideas??????????:conf used:

oldsinner111

you might check the following,fuel filter,intake hoses not put together right,check catalytic convertor.check electrical connections.

johnny conkaroo

if its sporadic and inconsistent accelerating it could be coil packs.

number_one_c55

sorry, vehicle is a 1994 does not have coil packs, main ignition coil has been replaced as well.

johnny conkaroo

wow didnt know that. when did they start using coil packs 96? i only got 3 out of 8 good coil packs, my car seems to have surges of power in the worst possible moments.

johnny conkaroo

how many times do i have to make u look like a clown. tonight when im with ur mother im gonna bust my nut on ur bunk bed ya *****

eddie a

Must be the coil packs?

number_one_c55

Checked codes with DAS, code in ME for hot wire mass air flow sensor - will replace this next.

InNeedOfSpeed

I am having the exact same problem. Did replacing the sensor help? I've got the -96 S500L and it really needs the low end torque that it is supposed to have!

My mother has the -96 SL500 with the same engine and hers have mountains of torque at the low end!

number_one_c55

Hello, sorry for very late reply. I cleaned my MAF unit with MAF specific cleaner. It helped my vehicle but still wasnt 100%. Keep in mind that M119 engines are notorious for distributor caps, cam seals and plugs going back. Check these as well!

Hope this helps!

InNeedOfSpeed

Alright

Yeah the first thing I did after buying the car was new distributor caps and rotors, they were completely destroyed.

I cleaned my MAF with break cleaner, I think it's pretty close to MAF cleaner. It might have helped a bit but definitely not completely.

Not sure if plugs are likely since it works brilliantly at higher rpm, but maybe. (I've had it up to 260 km/h on the speedo)

Might try buying a new MAF even tho they are hella expensive... Was going to swap for the one in my moms SL500 but it turns out it's a couple months newer and has the plastic one while i have the metal one

number_one_c55

Hello,

If your mothers vehicle is equipped with M119 engine. Please swap MAF sensors from vehicle to vehicle. If problem still persists you will have further diagnosis to do. I would recommend taking vehicle to dealer to have fault codes printed out.

InNeedOfSpeed

Yeah I would swap but I can't. Hers is different, two sensors in a plastic tube. Mine is aluminium and only has one combined sensor :/

number_one_c55

Hello, your mothers vehicle is equipped with a M113 not a M119 engine.

InNeedOfSpeed

Nah it's a 1996 SL500. They changed the MAF and some other stuff like 1996-06 i think. Same time they changed to the 5-speed transmission. Mine's a 4-speed, hers is a 5-speed.